A FastBack Jersey Clip keeps the water in your mouth and the dirt on the floor. Attach about mid-chest and immediate hydration is yours with no more effort than a lean. When you're off the bike, hook the tube to your FastBack bag and you'll be sure to never drop your drink in the dirt. Works with any brand bladder!
There is only so much you can say about jersey clips.
They are fine. I am happy Terracycle stocks these, they make a nice add-on when you purchase other things.